When the government levies a tax where everyone is taxed the same fixed percentage of their incomes, this tax is known as a(n):

Which of the following has not influenced global poverty rates?

A. Gini coefficient B. Increasing population C. Income polarity D. Differential access to health care

Helen gives up the opportunity to bake 40 cakes for each room she paints; Josh can paint one room in the time it takes him to bake 60 cakes. The opportunity cost of a cake for Helen is

a. painting one room b. painting 1/40 of a room c. painting 1/60 of a room d. painting 2/3 of a room e. painting 3/2 of a room